You can then add your department group or individual people from within your organization for whom you’ll grant appropriate Read and/or Write permissions to your Calendar so only they can see you availability and, if set, your whereabouts.
If you are in an Exchange 2010 or earlier environment with Outlook 2003 support enabled (basically any environment with Public Folders enabled), then legacy Free/Busy information is also published to the Public Folders and can be read by Outlook 2003 clients.
I have a user the only user that when they try to schedule a meeting and use the scheduling assistant everyone that she adds has no information, she used the same tool in her previous 2010 office without issue.
She is on a new PC and a fresh install of 2013 office.
However, if that is already too much to be shared or if you want only certain people to see your availability, you can do this via Calendar Permissions and altering your Free/Busy Publishing settings.
Since Outlook 2007 in combination with Exchange 2007 or later, the Free/Busy information is directly obtained from your Calendar via the Exchange Availability Assistant.
There are four kinds of permission levels allowing others to view the free and busy information in the selected calendar: None; Free/Busy time; Free/Busy time, subject, location; and Full Details.
I have read the Microsoft thread and I have tried all that they have said would fix this issue to no avail.
Your free/busy times are shown when someone invites you to a meeting they are scheduling.
The meeting proposer can see your free/busy times in the Scheduling Assistant.
This method will show you how to set or change the permission lever for others viewing your free and busy information easily in Microsoft Outlook 20.
Step 1: Shift to the Calendar view, and select a calendar that you will share its free and busy information with others under My Calendars.